My spider got stuck too a little after getting the climbing ability and I never got to find out what the scientist can do to help :(
The concept of a small spider working together with a big human in different perspectives really is neat and from other comments, it sounds like the power ups were really well done if you did not get stuck. A random thing I noticed though is that for some reason my slow GPU goes up to 100% when I am the spider, but is barely used at all when I am the scientist. At least I could swap back and forth to keep my computer from over heating.
Hope you are able to find why the spider gets stuck.